#include <REGX52.H>
#include <INTRINS.h>

void Delay500us()		//@12.000MHz
{
	unsigned char i;

	_nop_();
	i = 247;
	while (--i);
}

void main(void){
	unsigned int i = 0;
	while(1){
		for(i=0;i<2000;i++){
		P2_5 = ~P2_5;
			Delay500us();
		}
	}
}